APA (7th ed.) Citation

Haskell, A. L. (1965). What is a ballet. Macdonald.

Chicago Style (17th ed.) Citation

Haskell, Arnold Lionel. What Is a Ballet. London: Macdonald, 1965.

MLA (9th ed.) Citation

Haskell, Arnold Lionel. What Is a Ballet. Macdonald, 1965.

Warning: These citations may not always be 100% accurate.